Diseases of The Gastrointestinal Tract Yun MA, M.D. Professor Dept. of Pathology Guangxi Medical University Tel: 5356534(O) E-mail:[email protected].
Unit 10 It’s a nice day, isn’t it? Period 2 Practice in pairs : A:, ? B: Yes,. A:, ? B : Yes/No.. A: B:, ?. can sing? He runs very fastdoesn’t he he.